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Differences between the two beam designs (single vs. multiple web openings) can be significant in terms of distance between openings and structural performance due to other related factors.
The investigation of the said structural characteristics involved enlarging the web opening area ratio in the multi web openings and the steel tube’s width-thickness ratio (H/t), and using the web openings’ area ratio and location and the type of fiber that affect the structural performance as the main variables.
Mechanical properties of material To identify the properties of materials used in the manufacture of HPRWO, tensile strength testing was performed on the steel, and compressive strength testing on the concrete.
(2) In the case of providing the systems (web openings) at a location affected by the moments, it is expected that the yield strength of the HPRWO specimens will increase and the crack development be controlled as well
Park: A Study on the Structural Properties of RC Beams with Openings using Square Steel Tube According to Location and Area of Openings, Proceeding of Fall Annual Conference of the Architectural Institute of Korea (2010), p. 127-128 [5] S.

Microstructure and Stress Variation of Semisolid 7A04 Alloy during Isothermal Compression YANG hui1, a, TIAN Wentong1 1School of Mechanical and Technological Engineering, CIT, Changzhou 213002, China ayangh@czu.cn Keywords: semisolid 7A04 alloy; deformation temperature; strain rate; segregation of liquid-solid phase Abstract: The microstructure and stress variation of semisolid 7A04 alloy have been studied through unconstrictive isothermal compressing test.
Analysis on the microstructure of compressive specimen demonstrates that segregation of liquid-solid phase is mainly affected by strain rate and deformation temperature.
Because compressive deformation is the main deformation style in the metalworking, and the compressive behavior of semisolid alloys is completely different from that of solid alloys due to its peculiar properties.
The alloy possesses strain rate sensitivity in semisolid state, which means that deformation temperature and strain rate are two key factors to determine the main deformation style of compressive deformation in semisolid state.

According to Yang and Liu [2] even though titanium alloy is difficult to machine due to its low thermal conductivity and high chemical reactivity properties, manufacturers still opt for it for its superior properties.
Workpiece Material Constitutive Equations Hooke’s Law describe the elastic properties of materials.
Mechanical and thermal properties are required for both workpiece and cutting tool.
The reason titanium alloys are harder to machine is due to its inherent properties.
High temperature is the main factor of causing tool wear rapidly.

Introduction Epoxy resins, due to the possibility of their modification, due to the presence of reactive hydroxyl and epoxy groups, with the production of materials with high physical and mechanical properties, are still the most promising among other organic high molecular weight substances [1-3].
Composite materials based on epoxy oligomers are widely used in practice due to high adhesion, high heat resistance, low brittleness, low shrinkage during curing, stability of technological properties and several other properties.
Due to such properties, materials based on epoxy resins are widely used in various industries: as film-forming substances in the refining industry, shipbuilding, construction, etc. [4,5].
Obtaining epoxy polymer composites for construction purposes with predetermined properties is usually associated with the use of physicochemical modification methods: the introduction of solid insoluble fillers and fillers, surfactants, inert plasticizers and thinners [6-8].
The elastic properties as well as the impact strength of matrix composites depend on various factors: temperature conditions of curing, mechanochemical effects during the hardening process, but to a greater extent on the type of hardener and its concentration.

Micro-mechanical piezoresistive accelerometer was first demonstrated in the late 1970s by Roylance and Angell [1].
Because of processing factor, piezoresistor’s resistance is different from each other.
This paper uses ANSYS software to simulate the accelerometer’s self-test property, and the FEA model is shown in fig.6.
This perhaps causes by the following reasons. 1) The piezoresistors’ practical resistance is bigger than the designed. 2) The beams will have various degree deformation caused by the residual stress. 3) Noise jamming signal will affect the testing results.
Study of Piezoresistive Micro Electro-Mechanical Accelerometer Design Platfor.

The pulse electrochemical machining has gotten researchers attention in various countries because it has its own characters and advantages and can solve many problems in mechanical finishing.
The surface obtained by PECF has good surface mechanical property.
However, the products and temperature will increase rapidly if the current density is too large, which would affect the homogeneity of the flow field and surface quality.
The study of the experiment also indicates that, the transformation of the physicochemical property of the gap is different in different frequency range and different range of pulse width.
Generally, the higher the pulse frequency is, and the smaller the duty ratio is, and the stronger and larger the pulse and the transformation of the physicochemical property are.

The entry phase is regarded as the biggest influencing factor for the reamer’s deflection with increasing bore depth.
Improving engine’s control, adding a boosting device, reducing number of cylinders and increasing the surface properties accompanies downsizing.
Since each machining process is affected by undesired disturbances, deviations concerning the target geometry in the area of the pre-drilled bores can occur [8].
The entry phase is regarded as the biggest influencing factor for the reamer’s deflection over the bore depth.
Table 1: Material properties of used 42CrMo4V Rp0,2% Rm A Z hardness 672 N/mm2 900 N/mm2 19% 57% 280 HV For these experiments tests with two different bore diameters were conducted.

Physical properties and biological performance of bioactive glasses and glass-ceramics tested in vitro V.
The bioactive properties of these glasses depend on the presence of large amounts of sodium and calcium modifier cations, which break the Si–O–Si bridges and lead to fragmentation of the silicate network on the account of the increased number of nonbridging oxygen atoms [3].
Understanding of composition-structure-properties relationship of these materials at atomic level is of great importance to obtain biomaterials for certain applications.
The tissue bonding ability of bioactive glasses, and generally of bioactive materials, is related to the presence of a hydroxyapatite layer on their surface, that promotes further cellular steps, such as incorporation of collagen and interaction with other biomolecules and tissue growth factors [6, 7].
Hill, Effect of P2O5 content in two series of soda lime phosphosilicate glasses on structure and properties – Part I: NMR, J.

Excessive large tension can make cutting line break; while excessive small can cause additional low frequency vibration of cutting line and insufficient carrying capacity, so as to affect the workpiece’s surface processing quality.
In the winding process, the biggest factor of tension change is due to the increasing diameter of wrap wheel.
Fig.3 Torque speed characteristic curve of generally motor and torque motor Curve Two Curve One 1 2 3 In fig.3, curve1 stands for the mechanical characteristic of general motor, and curve 2 stands for the mechanical characteristic of torque motor.
In fig.3, is synchronous speed, is Stall torque, is general motor’s speed at maximum torque, and also the sub-boundaries of the mechanical properties of the “stable part” and “unstable part”.
From fig.3, we know that mechanical characteristic of the torque motor is very soft.

Introduction Materials that possess both magnetic and electrical properties have drawn much attention in recent years because of their potential use in novel devices in which magnetic and electric properties can be mutually controlled [1].
The TEM specimens were prepared from the polycrystalline samples by mechanical grinding, dimple grinding, and subsequently ion-milling.
Obviously, this is benefit to the improvement in the dielectric properties, as proved by the data of dielectric properties.
To further reduce the dielectric losses of the 0.33BTO-0.67BFO solid solutions and to confirm that the change in dielectric properties is repeatable, the dielectric properties of the samples with higher Mn-doped concentrations (e.g., x = 1.0 - 10) have been measured.
Zhou, Factors controlling pure-phase multiferroic BiFeO3 powders synthesized by chemical co-precipitation, Journal of Alloys and Compounds. 509 (2011) 2192-2197